fceud_SOURCES = drivers/pc/input.c drivers/pc/main.c drivers/pc/sdl.c drivers/pc/sdl-joystick.c drivers/pc/sdl-sound.c drivers/pc/sdl-throttle.c drivers/pc/sdl-video.c drivers/pc/unix-netplay.c if OPENGL TMP_OGL = drivers/pc/sdl-opengl.c endif fceud_SOURCES += $(TMP_OGL)